Motor cooling means



Nov. 10, 1936. E. H. BAKER 2,060,363

MOTOR COOLING MEANS Filed 001;. 9, 1953 ATTURNEU:

Patented Nov. 10, 1936 UNITED STATES PATENT OFFICE MOTOR COOLING MEANS Edward H. Baker, Belmont, Mass.

Application October 9, 1933, Serial No. 692,817

2 Claims. (Cl. 123-171) My invention relates to means for controlling and directing the rearward air blast from the fan conventionally employed, in the case of water v cooled internal combustion motors of automobiles, to suck air rapidly through the waterfilled radiator so as to cool the water which circulates through the radiator and thewater jacket of-the motor.

It has long been the common practice in the case of such cooling systems to permit the rearward blast of air, caused by the rapidly revolving fan located closely behind the radiator to impinge freely upon the motcr'behind it thussubjecting the motor generally to the direct cooling l5 influence of the air blast as well as to that cooling influence afforded by the water which absorbs the heat of combustion in the motor water jacket and dissipates it as the heated stream of water passed through the radiator.

20 I have discovered, howeventhat the above. de-

scribed common practice insofar as it involves subjecting the motor itself to'the full and direct influence of the rearward fan blast, is in a large measure detrimental to eflicient motor operation 0 since some parts of the motor function better if shielded from the rearward air blast, and that the air blast may be easily and conveniently controlled so that its cooling influence may be directed to parts of the motor where beneficial cooling is needed while leaving unaffected parts of the motor which are better left uninfluenced by the strong blast of air projected rearwardly by the fan.

It has been the object of my invention so to control and direct the air blast from the fan that it shall not cool the fuel supply system of the motor, which is benefited by heat transferred by conductance and radiation from the cylinders, and also shall not interfere with the intake of air to the carburetor, while causing it, nevertheless, to bathe more effectively the lower part of the motor thus beneficially cooling the oil in the crank case.

My invention may be best understood by reference to the accompanying drawing in which Fig. 1 is a generally illustrative left side view of an internal combustion motor of V type, showing the motor fan and my means for controlling its rearward air blast, and the radiator in its 50 conventional position with respect thereto.

Fig. 2 is a front view of the fan with my rearward blast control means in association therewith.

Fig. 3 is a vertical section on line 3-3 of Fig. 2

55 showing the general assembly of the fan, the

It is to be understood, of course, that the motor as illustrated is to be mounted within the frame of an automobile and encased in a hood of any conventional design which embraces the rearward edge of the radiator and extends backwardly therefrom.

Referring now more specifically to the drawings; l is the motor provided with an intake manifold 2 to which isconnected a down-draft carburetor 3 by means of the upwardly extending intake pipe 4. An air strainer dis mounted on top of the air intake pipe 6 of the carburetor 3, the air strainer 5 being open at its bottom for the admission of air. The fuel pump 1 is connected by pipe 8 to the carburetor 3. Upon a bracket 9 is revolubly mounted the pulley l0 which is driven by the belt II running on the driving pulley l2.

The fan It has a hub M provided with a flange [5 (see Fig. 3). Clamped between the pulley l0 and the hub flange l5 of the fan I3 by means of screw bolts i6 is my rearward fan blast control means consisting of the circular plate ll. The radiator I8 lies closely in front of the fan l3, according to standard practice.

The operation of my device is as follows: The plate I! directly intercepts much of the central part of the rearward air blast from the fan and causes the air stream to be spread divergently from the axis of the fan so that it emerges beyond the plate ll at an angle of about 45 degrees from the horizontal axis of rotation of the fan thus passing above the intake manifold, fuel pump and carburetor and even over the air intake of the carburetor in the bottom of the air strainer 5. Below the axis of the fan the blast passes downward across the front of the motor, and under and around the oil reservoir in the lower part thereof. Hence the fuel pump, carburetor, down-draft pipe and intake manifold are left in a calm area from which the heat of the motor cylinder blocks is not carried off by the fan blast, in the usual manner, but is allowed to heat these parts by conductance and radiation so that the combustible mixture of air and gasoline is more completely gasified, thereby giving more effective combustion, and the oil in the crank case is made cooler thereby affording more effective lubrication.

Since, with my device, a blast of air is not rushing horizontally across the air intake in the base of the air strainer 5 so as to interfere with the intended inward suction of air at that point by tending to set up an outward suction from the intake orifices, the inward breathing of the carburetor is more free and unimpeded.

I find that the use of my plate or baflle I1, notwithstanding its close relation to the fan itself, does not materially reduce the volume of air sucked inward through the radiator by the fan, so that efiective water cooling of the motor cylinders is not impaired. The motor will, however, at the start, warm up more readily when my device is used, since the cold fuel intake system is more quickly warmed up to produce effective carburetion because it is not subjected to a cooling blast of air. Hence less choking of the carburetor is required and waste of gasoline and risk of crank case oil dilution from excessive or prolonged choking is avoided. A marked economy of both fuel and lubricating oil results from the use of my device.

Although I have described and shown my device as a revolving circular plate attached to, and revolving with, the fan, it will be readily understood that such particular features are not essential as the plate or baffle might be somewhat variously shaped and mounted in a fixed or stationary manner and located more remotely from the fan and in any position such that the ultimate functional effects with respect to controlling and directing the air blast, for the purposes above described, may be attained, or the fan itself may be so constructed, located and arranged as to produce the divergent rearward blast with calm central area which results from the use of my plate [1, or the general functional result contemplated.

While the benefits of my device are more strikingly apparent in the case of a V type motor which has a centrally located fuel intake system, as illustrated in the drawings, yet I do not intend to limit my invention to such a precise combination and arrangements of parts, as it is apparent that my device may be usefully employed in association with any conventional type of vertical motor, since such motors commonly have a fuel intake system embodying a manifold extending along the upper part of the cylinder block in such position that an abruptly spreading rearward blast of air from the fan will leave the intake system uninfiuenced by a backward stream of heat dissipating air.

Having thus fully described my invention, what I claim is:

1. In a device of the character specified the combination with a motor, having a gasoline intake system and a carburetor in the upper part thereof, and a water cooling radiator, of a fan, located between said motor and said radiator, and a baffle plate mounted in close proximity to said fan, said baffle plate being so constructed and arranged that it will spread the blast of air from said fan divergently and directly from all parts of the periphery of said baffle plate into the outer atmosphere surrounding said motor in such manner that said blast of air shall not impinge upon the upper part of said motor and shall not contact the gasoline intake system and carburetor thereof.

2. In a device of the character specified the combination with a motor, having a gasoline intake system and a carburetor in the upper part thereof, and a water cooling radiator, of a bafile plate mounted in close proximity to said fan and symmetrically located with respect to the axis of rotation of said fan, and of a size substantially less than the area embraced Within the circumference of said fan whereby it may spread the blast of air from said fan divergently and directly, from all parts of the periphery of said baffle plate into the outer atmosphere surrounding said motor in such manner that it shall not impinge upon the upper part of said motor and shall not contact the gasoline intake system and carburetor thereof.

EDWARD H. BAKER. 

